Acetaldehyde
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CAS
75-07-0
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CH3CHO
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RTECS
AB1925000
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Synonyms & Trade Names
Acetic aldehyde, Ethanal, Ethyl aldehyde
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DOT ID & Guide
1089 / 129
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Exposure
Limits
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NIOSH REL: Ca See Appendix A See Appendix C (Aldehydes)
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OSHA PEL†: TWA 200 ppm (360 mg/m3)
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IDLH
Ca [2000 ppm]
See: 75070
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Conversion
1 ppm = 1.80 mg/m3
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Physical Description
Colorless liquid or gas (above 69°F) with a pungent, fruity odor.
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MW: 44.1
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BP: 69°F
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FRZ: -190°F
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Sol: Miscible
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VP: 740 mmHg
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IP: 10.22 eV
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Sp.Gr: 0.79
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Fl.P: -36°F
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UEL: 60%
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LEL: 4.0%
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Class IA Flammable Liquid: Fl.P. below 73°F and BP below 100°F.
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Incompatibilities & Reactivities
Strong oxidizers, acids, bases, alcohols, ammonia & amines, phenols, ketones, HCN, H2S [Note: Prolonged contact with air may cause formation of peroxides that may explode and burst containers; easily undergoes polymerization.]
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Measurement Methods
NIOSH 2018, 2538, 3507; OSHA 68
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, nose, throat; eye, skin burns; dermatitis; conjunctivitis; cough; central nervous system depression; delayed pulmonary edema; in animals: kidney, reproductive, teratogenic effects; [potential occupational carcinogen]
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Target Organs
Eyes, skin, respiratory system, kidneys, central nervous system, reproductive system
Cancer Site
[in animals: nasal cancer]
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See also: INTRODUCTION
See ICSC CARD: 0009 See MEDICAL TESTS: 0001
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